Look, it's very simple.
The game is not terribly bad, but nowhere good or decent aswel. Given the expectations it's been a huge dissapointment to almost all, except for a few die-hard fans of either Telltale or the Jurassic Park license, who will most likely applaud anything that comes out on this.
If you pre-order, you're taking a big risk....and doing so is usually for the fanboys of Telltale. They'll like anything anyway.
But if you await the reviews of various reputable Adventure gaming sites, than you'll see plenty of warnings concerning this game. That should be sufficient.
On the aggregator site like Gamerankings.com, the game has an avg. of 5.5 out of 10 based on 24 reviews.
That screams "mediocre". So it's not terrible, but it will have many many flaws.
If you are a critical gamer, than stay clear of such titles and take something else. If you're not and are simply looking for a Jurassic Park experience of any kind, than this may be for you.
It's not rocket science, just use some common sense!